I'll summarize. They both put pressure on people. One is much more capable of correcting on social mistakes, while one is more capable of correcting on logical mistakes. I assume spelling is a logical mistake, and a faux pas is a social mistake. Taken to it's extreme, LSI is probably my friend who I haven't talked to in a while. He does machine code. I can learn how, I just don't see the point.

Also, for fun, LIE/ILI:

https://www.youtube.com/watch?v=JZmw3jzX1t0